C++ IShellFolder::CreateViewObject方法代码示例

static HRESULT GetDesktopShellView(
    __in REFIID riid,
    __out void **ppv
    )
{
    HRESULT hr = S_OK;
    IShellWindows* psw = NULL;
    HWND hwnd = NULL;
    IDispatch* pdisp = NULL;
    VARIANT vEmpty = {}; // VT_EMPTY
    IShellBrowser* psb = NULL;
    IShellFolder* psf = NULL;
    IShellView* psv = NULL;

    // use the shell view for the desktop using the shell windows automation to find the 
    // desktop web browser and then grabs its view
    // returns IShellView, IFolderView and related interfaces
    hr = ::CoCreateInstance(CLSID_ShellWindows, NULL, CLSCTX_LOCAL_SERVER, IID_PPV_ARGS(&psw));
    ExitOnFailure(hr, "Failed to get shell view.");

    hr = psw->FindWindowSW(&vEmpty, &vEmpty, SWC_DESKTOP, (long*)&hwnd, SWFO_NEEDDISPATCH, &pdisp);
    if (S_OK == hr)
    {
        hr = IUnknown_QueryService(pdisp, SID_STopLevelBrowser, IID_PPV_ARGS(&psb));
        ExitOnFailure(hr, "Failed to get desktop window.");

        hr = psb->QueryActiveShellView(&psv);
        ExitOnFailure(hr, "Failed to get active shell view.");

        hr = psv->QueryInterface(riid, ppv);
        ExitOnFailure(hr, "Failed to query for the desktop shell view.");
    }
    else if (S_FALSE == hr)
    {
        //Windows XP
        hr = SHGetDesktopFolder(&psf);
        ExitOnFailure(hr, "Failed to get desktop folder.");

        hr = psf->CreateViewObject(NULL, IID_IShellView, ppv);
        ExitOnFailure(hr, "Failed to query for the desktop shell view.");
    }
    else
    {
        ExitOnFailure(hr, "Failed to get desktop window.");
    }

LExit:
    ReleaseObject(psv);
    ReleaseObject(psb);
    ReleaseObject(psf);
    ReleaseObject(pdisp);
    ReleaseObject(psw);

    return hr;
}

void CDropHandler::HandleRightClickDrop(void)
{
	IShellFolder *pDesktop = NULL;
	IShellFolder *pShellFolder = NULL;
	IDropTarget *pDrop = NULL;
	LPITEMIDLIST pidlDirectory = NULL;
	DWORD dwe;
	HRESULT hr;

	hr = GetIdlFromParsingName(m_szDestDirectory,&pidlDirectory);

	if(SUCCEEDED(hr))
	{
		hr = SHGetDesktopFolder(&pDesktop);

		if(SUCCEEDED(hr))
		{
			hr = pDesktop->BindToObject(pidlDirectory,0,IID_IShellFolder,(void **)&pShellFolder);

			if(SUCCEEDED(hr))
			{
				dwe = *m_pdwEffect;

				hr = pShellFolder->CreateViewObject(m_hwndDrop,IID_IDropTarget,(void **)&pDrop);

				if(SUCCEEDED(hr))
				{
					pDrop->DragEnter(m_pDataObject,MK_RBUTTON,m_ptl,&dwe);

					dwe = *m_pdwEffect;
					pDrop->Drop(m_pDataObject,m_grfKeyState,m_ptl,&dwe);

					pDrop->DragLeave();

					pDrop->Release();
				}

				pShellFolder->Release();
			}

			pDesktop->Release();
		}

		CoTaskMemFree(pidlDirectory);
	}
}

/*
 * Class:     sun_awt_shell_Win32ShellFolder2
 * Method:    doGetColumnValue
 * Signature: (JJI)Ljava/lang/Object;
 */
JNIEXPORT jobject JNICALL
    Java_sun_awt_shell_Win32ShellFolder2_doGetColumnValue
            (JNIEnv *env, jobject obj, jlong iShellFolder,
            jlong jpidl, jint columnIdx)
{

    HRESULT hr;
    IShellFolder *pIShellFolder = (IShellFolder*) iShellFolder;
    IUnknown *pIUnknown = NULL;


    LPITEMIDLIST pidl = (LPITEMIDLIST) jpidl;
    SHELLDETAILS sd;

    hr = pIShellFolder->QueryInterface(IID_IShellFolder2, (void**)&pIUnknown);
    if(SUCCEEDED (hr)) {
        // The folder exposes IShellFolder2 interface
        IShellFolder2 *pIShellFolder2 = (IShellFolder2*) pIUnknown;
        hr = pIShellFolder2->GetDetailsOf(pidl, (UINT)columnIdx, &sd);
        pIShellFolder2->Release();
        if (SUCCEEDED (hr)) {
            STRRET strRet = sd.str;
            return jstringFromSTRRET(env, pidl, &strRet);
        }
    }

    hr = pIShellFolder->CreateViewObject(NULL, IID_IShellDetails, (void**)&pIUnknown);
    if(SUCCEEDED (hr)) {
        // The folder exposes IShellDetails interface
        IShellDetails *pIShellDetails = (IShellDetails*) pIUnknown;
        hr = pIShellDetails->GetDetailsOf(pidl, (UINT)columnIdx, &sd);
        pIShellDetails->Release();
        if (SUCCEEDED (hr)) {
            STRRET strRet = sd.str;
            return jstringFromSTRRET(env, pidl, &strRet);
        }
    }

    // The folder exposes neither IShellFolder2 nor IShelDetails
    return NULL;
}

/*
 * Class:     sun_awt_shell_Win32ShellFolder2
 * Method:    doGetColumnInfo
 * Signature: (J)[Lsun/awt/shell/ShellFolderColumnInfo;
 */
JNIEXPORT jobjectArray JNICALL
    Java_sun_awt_shell_Win32ShellFolder2_doGetColumnInfo
            (JNIEnv *env, jobject obj, jlong iShellFolder)
{

    HRESULT hr;
    IShellFolder *pIShellFolder = (IShellFolder*) iShellFolder;
    IUnknown *pIUnknown = NULL;

    jclass columnClass = env->FindClass("sun/awt/shell/ShellFolderColumnInfo");
    if(NULL == columnClass) {
        return NULL;
    }

    jmethodID columnConstructor =
        env->GetMethodID(columnClass, "<init>", "(Ljava/lang/String;IIZ)V");
    if(NULL == columnConstructor) {
        return NULL;
    }

    // We'are asking the object the list of available columns
    SHELLDETAILS sd;

    hr = pIShellFolder->QueryInterface(IID_IShellFolder2, (void**)&pIUnknown);
    if(SUCCEEDED (hr)) {

        // The folder exposes IShellFolder2 interface
        IShellFolder2 *pIShellFolder2 = (IShellFolder2*) pIUnknown;

        // Count columns
        int colNum = -1;
        hr = S_OK;
        do{
            hr = pIShellFolder2->GetDetailsOf(NULL, ++colNum, &sd);
        } while (SUCCEEDED (hr));

        jobjectArray columns =
            env->NewObjectArray((jsize) colNum, columnClass, NULL);
        if(NULL == columns) {
            pIShellFolder2->Release();
            return NULL;
        }

        // Fill column details list
        SHCOLSTATEF csFlags;
        colNum = 0;
        hr = S_OK;
        while (SUCCEEDED (hr)) {
            hr = pIShellFolder2->GetDetailsOf(NULL, colNum, &sd);

            if (SUCCEEDED (hr)) {
                hr = pIShellFolder2->GetDefaultColumnState(colNum, &csFlags);
                if (SUCCEEDED (hr)) {
                    if(!(csFlags & SHCOLSTATE_HIDDEN)) {
                        jobject column = CreateColumnInfo(env,
                                            &columnClass, &columnConstructor,
                                            &sd, csFlags & SHCOLSTATE_ONBYDEFAULT);
                        if(!column){
                            pIShellFolder2->Release();
                            return NULL;
                        }
                        env->SetObjectArrayElement(columns, (jsize) colNum, column);
                    }
                }
                colNum++;
            }
        }

        pIShellFolder2->Release();

        return columns;
    }

    hr = pIShellFolder->CreateViewObject(NULL, IID_IShellDetails, (void**)&pIUnknown);
    if(SUCCEEDED (hr)) {
        // The folder exposes IShellDetails interface
        IShellDetails *pIShellDetails = (IShellDetails*) pIUnknown;

        // Count columns
        int colNum = -1;
        hr = S_OK;
        do{
            hr = pIShellDetails->GetDetailsOf(NULL, ++colNum, &sd);
        } while (SUCCEEDED (hr));

        jobjectArray columns =
            env->NewObjectArray((jsize) colNum, columnClass, NULL);
        if(NULL == columns) {
            pIShellDetails->Release();
            return NULL;
        }

        // Fill column details list
        colNum = 0;
        hr = S_OK;
//.........这里部分代码省略.........